US7517354B2 - Medical instrument - Google Patents

Medical instrument Download PDF

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Publication number
US7517354B2
US7517354B2 US10/872,846 US87284604A US7517354B2 US 7517354 B2 US7517354 B2 US 7517354B2 US 87284604 A US87284604 A US 87284604A US 7517354 B2 US7517354 B2 US 7517354B2
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US
United States
Prior art keywords
jaw member
push
transmission lever
pull element
tool
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active, expires
Application number
US10/872,846
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English (en)
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US20050038469A1 (en
Inventor
Dieter Lang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Karl Storz SE and Co KG
Original Assignee
Karl Storz SE and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Karl Storz SE and Co KG filed Critical Karl Storz SE and Co KG
Assigned to KARL STORZ GMBH & CO. KG reassignment KARL STORZ GMBH & CO. KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LANG, DIETER
Publication of US20050038469A1 publication Critical patent/US20050038469A1/en
Application granted granted Critical
Publication of US7517354B2 publication Critical patent/US7517354B2/en
Assigned to KARL STORZ SE & CO. KG reassignment KARL STORZ SE & CO. KG CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: KARL STORZ GMBH & CO. KG
Active legal-status Critical Current
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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/28—Surgical forceps
    • A61B17/29—Forceps for use in minimally invasive surgery
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B10/00—Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
    • A61B10/02—Instruments for taking cell samples or for biopsy
    • A61B10/06—Biopsy forceps, e.g. with cup-shaped jaws
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
    • A61B17/1604—Chisels; Rongeurs; Punches; Stamps
    • A61B17/1606—Chisels; Rongeurs; Punches; Stamps of forceps type, i.e. having two jaw elements moving relative to each other
    • A61B17/1608—Chisels; Rongeurs; Punches; Stamps of forceps type, i.e. having two jaw elements moving relative to each other the two jaw elements being linked to two elongated shaft elements moving longitudinally relative to each other
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/28—Surgical forceps
    • A61B17/29—Forceps for use in minimally invasive surgery
    • A61B2017/2926—Details of heads or jaws
    • A61B2017/2932—Transmission of forces to jaw members
    • A61B2017/2939—Details of linkages or pivot points

Definitions

  • the invention relates to a medical instrument having a hollow shaft and, positioned on its proximal end, a handle consisting of at least two gripping members and, on its distal end, a tool consisting of at least two jaw members.
  • the instrument's jaw members are stationed at a lateral angle to the longitudinal axis of the shaft so that at least one jaw member of the tool can be moved for opening and closing by means of a gripping member of the handle that can be rotated with respect to the at least one other jaw member of the tool and the at least one movable jaw member and the corresponding gripping member of the handle serving to move the jaw member are connected to one another by a push/pull element positioned in the hollow shaft.
  • Both the positioning of the disk in the movable jaw member and the positioning of the movable jaw member in the rigid jaw member housing provide a certain free play that allows the activation rod to move with respect to the movable jaw member together with the disk.
  • This familiar medical pincer has the structural disadvantage that the coupling between the activation rod and the movable jaw member has free play at various storage positions, so that motion of the activation rod by means of the gripping element does not lead immediately, without hesitation, to activation of the movable jaw member. Because of this free play, it is impossible for the operator to activate the pincer in a controlled, calibrated manner, because it is necessary first to overcome the existing play before the pincer can grip.
  • the invention fulfills this aim in a distinctive manner in that the push/pull element and the respective jaw member of the tool are connected to one another by means of a transmission lever.
  • Direct power transmission allows the operator to apply force purposefully and in calibrated quantities. Rather than being obliged first to overcome a dead space caused by free play, the activation of the handle now causes an immediate reaction of the jaw member. By means of corresponding design of the particular transmission lever, it is even possible to distribute according to function the forces to be transmitted and thus to provide the operator with an even better cutting and gripping sensation.
  • the transmission lever is situated at an angle in the direction toward the tool.
  • the transmission lever takes the form of a two-sided rotatably mounted transmission lever, both of whose free ends have spherical joint, which are each positioned in corresponding spherical recesses in the movable jaw member or on the push/pull element.
  • the spherical joint positioned on the movable jaw member and/or the spherical joint positioned on the push/pull element consists of two hemispheres with different diameters.
  • Use of the two different-sized hemispheres makes it possible to distribute the forces that are to be transmitted, such as for instance the force for simply opening the jaw member and the cutting, punching, or holding forces that are to be exerted by the jaw member, on the different hemispheres, In addition to the exact sizing of the hemispheric sizes on the forces to be transmitted, this ensures that the operator has a good, precise cutting sensation.
  • the use of these insertable mounting elements has the advantage that the mounting elements and also the transmission lever are easily accessible for purposes of maintenance and repair.
  • the transmission lever is configured as a rod that is firmly connected with the push/pull element and engages in a corresponding guide track in the movable jaw member or in a corresponding guide tracks in each movable jaw member.
  • the transmission lever is configured as a rod that is firmly connected with a movable jaw member and engages in a corresponding guide track in the push/pull element.
  • the transmission lever is configured as a rod that is firmly connected with the push/pull element and on the distal side is positioned in a cylindrical casing which in turn is mounted in a corresponding guide track in a movable jaw member, so that force is transmitted from the rod onto the cylindrical casing and from this casing further onto the jaw member.
  • FIG. 1 shows a side view of a first embodiment of an inventive medical instrument, showing the jaw members in the closed position.
  • FIG. 2 shows a view as in FIG. 1 but with jaw members opened.
  • FIG. 3 shows an enlarged section along the line III-III as in FIG. 1 .
  • FIG. 4 shows an enlarged section along the line IV-IV as in FIG. 2 .
  • FIG. 5 shows an enlarged section along the line V-V as in FIG. 2 .
  • FIG. 6 shows a perspective detail view of the distal end of the push/pull element equipped with a transmission lever.
  • FIG. 7 shows a lateral view of a transmission lever.
  • FIG. 8 shows a detail explosion view of a second embodiment of an inventive medical instrument.
  • FIGS. 1 and 2 present lateral views of a medical instrument 1 whose power transmission mechanism has multiple applications, for instance as punches, scissors, needle holders, grasping instruments, and the like.
  • the medical instrument 1 consists essentially of a hollow shaft 2 on whose proximal end a handle 3 is mounted consisting of a rigid gripping member 3 a and a gripping member 3 b that can rotate around a rotation axis 4 with respect to the rigid gripping member 3 a.
  • a tool 5 On the distal end of the shaft 2 there is a tool 5 , which in the illustrated embodiment ( FIG. 5 ) consists of a rotatable jaw member 5 a and a jaw member 5 b that is rigidly connected with the shaft 2 , in such manner that the rotatable jaw member 5 a can rotate with respect to the rigid jaw member 5 b around a rotation axis 6 .
  • the jaw members 5 a, 5 b of the tool 5 are configured as bent to the side with respect to the longitudinal axis of the shaft 2 .
  • the jaw members 5 a, 5 b are each at a right angle to the longitudinal axis of the instrument shaft. Other angles between zero and 90 degrees and even greater are also workable, however.
  • FIGS. 1 and 4 show the particular characteristic of the illustrated medical instrument 1 , that is, the connection of the rotatable jaw member 5 a by means of a transmission gear 7 with a push/pull element 8 , which is mounted in the hollow shaft 2 on the proximal side and connected with the rotatable gripping member 3 b of the handle 3 in such manner that the rotatable jaw member 5 a can be moved from the closed position ( FIGS. 1 and 3 ) into the opened position ( FIGS. 2 and 4 ) or vice versa by means of the rotation of the gripping member 3 b.
  • the push/pull element 8 is advantageously configured as a push/pull rod.
  • the transmission lever 7 used in this embodiment serves to transform and transmit the transmission movement exerted by the push/pull element 8 in the longitudinal direction of the shaft 2 into the rotation movement of the rotatable jaw member 5 a that is mounted at a right angle to the shaft 2 .
  • the transmission lever 7 has spherical joints 9 at both free ends and by means of these spheres the transmission lever 8 is mounted in corresponding spherical recesses 10 on the movable jaw member 5 a and on the push/pull element 8 .
  • the spherical joint 9 on the distal side which is mounted on the rotatable jaw member 5 a, is configured to consist of two hemispheres, in such manner that each hemisphere has a different diameter.
  • the hemisphere with the smaller diameter serves predominantly to exert the punching or cutting force of the movable jaw member 5 a, while the hemisphere with the greater diameter serves primarily to transmit the forces exerted by the push/pull element 8 to open the tool 5 .
  • the configuration of the smaller hemisphere to exert the punching or cutting forces also has the advantage that it better protects the power-exerting larger hemisphere from coming out of the spherical recess 10 by withdrawing the push/pull element 8 , opening the jaw member 5 a.
  • spherical joint 9 made up of different-sized hemispheres on the distal end of the transmission lever 8
  • the hemisphere that exerts the punching or cutting forces is also possible to form the hemisphere that exerts the punching or cutting forces as the hemisphere with the greater diameter.
  • the lever arm of the entire transmission lever 7 that is, the distance between the distal sphere border of the distal spherical joint 9 and the proximal sphere border of the proximal spherical joint 9 , can be increased so that the material strength of the spherical recesses 10 can be reduced with declining hemispherical diameter.
  • the spherical recesses 10 for storing the spherical joint 9 are configured as mounting elements 10 a, 10 b, and 10 c that can be inserted into the movable jaw member 5 a and the push/pull element 8 .
  • the spherical recesses 10 for storing the spherical joint 9 are configured as mounting elements 10 a, 10 b, and 10 c that can be inserted into the movable jaw member 5 a and the push/pull element 8 .
  • FIGS. 5 and 6 there are two mounting elements 10 a and 10 b on the movable jaw member 5 a and one mounting element 10 c on the push/pull element 8 .
  • FIG. 8 shows an alternative embodiment to the conformation of the transmission lever 7 for coupling of the push/pull element 8 with the rotatable jaw member 5 a.
  • the transmission lever is configured as a rod 11 securely connected with the movable jaw member 5 a, and this rod 11 engages in a corresponding guide track 12 in the push/pull element 8 .
  • the rod 11 which is positioned perpendicular to the longitudinal direction of the shaft 2 , moves in the guide track 12 , which is shaped in such manner that it is arched, so that the rotatable jaw member 5 a can be opened and closed by means of the rod 11 running in the guide track 12 .
  • the transmission of moving force/jaw member force can be adjusted in this embodiment by corresponding adjusting of the track curve of the guide track 12 so that the transmission is either constant over the entire track curve or else can be variably adjusted.
  • the medical instrument 1 illustrated in figs. 1 to 7 is activated as follows:
  • the push/pull element 8 coupled with this gripping member 3 b is moved in the longitudinal direction of the shaft 2 .
  • the push/pull element 8 and the movable jaw member 5 a are coupled together in the illustrated embodiment by means of the transmission lever 7 .
  • the transmission lever 7 is positioned bent at an angle in the direction toward the tool 5 .
  • the transmission lever 7 it is also possible to position the transmission lever 7 in such a way that it runs essentially in the opposite direction to the push/pull element 8 , that is, it is bent toward the proximal end, which is especially appropriate for tools 5 that are likewise bent in proximal direction.
  • the bending of the transmission lever 7 causes the tool 5 to open upon closing of the gripping members 3 a, 3 b of the handle 3 , that is, works contrary to the usual method of operation.
  • the medical instrument 1 illustrated in FIGS. 1 to 7 is activated as follows:
  • the activation of the tool 5 can again be adjusted in such a way that the closing of the gripping members 3 a, 3 b of the handle 3 cause the tool 5 to close.
US10/872,846 2003-06-20 2004-06-21 Medical instrument Active 2026-10-05 US7517354B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10327655A DE10327655A1 (de) 2003-06-20 2003-06-20 Medizinisches Instrument
DE10327655.6 2003-06-20

Publications (2)

Publication Number Publication Date
US20050038469A1 US20050038469A1 (en) 2005-02-17
US7517354B2 true US7517354B2 (en) 2009-04-14

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ID=33394887

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/872,846 Active 2026-10-05 US7517354B2 (en) 2003-06-20 2004-06-21 Medical instrument

Country Status (3)

Country Link
US (1) US7517354B2 (de)
EP (1) EP1488749B1 (de)
DE (2) DE10327655A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD669177S1 (en) * 2010-11-15 2012-10-16 Karl Storz Gmbh & Co. Kg Antrum punch forceps
USD669178S1 (en) * 2010-11-15 2012-10-16 Karl Storz Gmbh & Co. Kg Antrum punch forceps

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005021234A1 (de) 2005-05-09 2006-11-16 Karl Storz Gmbh & Co. Kg Medizinisches Instrument
US10405936B2 (en) 2008-04-11 2019-09-10 The Regents Of The University Of Michigan Parallel kinematic mechanisms with decoupled rotational motions
US8668702B2 (en) 2008-04-11 2014-03-11 The Regents Of The University Of Michigan Minimal access tool
US9629689B2 (en) 2008-04-11 2017-04-25 Flexdex, Inc. Attachment apparatus for remote access tools
US9869339B2 (en) 2008-04-11 2018-01-16 Flexdex, Inc. End-effector jaw closure transmission systems for remote access tools
DE102009011205A1 (de) 2009-03-04 2010-09-09 Karl Storz Gmbh & Co. Kg Medizinisches Instrument
US20160095584A1 (en) * 2014-10-01 2016-04-07 Boston Scientific Scimed, Inc. Endoscopic needle with rotary jaw for lateral acquisition
USD804029S1 (en) * 2015-01-16 2017-11-28 Karl Storz Gmbh & Co. Kg Scissor
EP3282952B1 (de) 2015-04-03 2019-12-25 The Regents Of The University Of Michigan Spannungsverwaltungsvorrichtung für kabelbetriebene übertragung
CN108712886B (zh) 2015-10-02 2021-06-04 弗莱克斯德克斯公司 提供无限制滚转的手柄机构
JP2018531694A (ja) 2015-10-05 2018-11-01 フレックスデックス, インク.Flexdex, Inc. 円滑に関節屈曲するマルチクラスタジョイントを有する医療デバイス
US11896255B2 (en) 2015-10-05 2024-02-13 Flexdex, Inc. End-effector jaw closure transmission systems for remote access tools
IL297954A (en) 2020-06-02 2023-01-01 Flexdex Inc Tool and assembly for surgery

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4258716A (en) 1978-02-06 1981-03-31 The University Of Melbourne Microsurgical instruments
DE8302716U1 (de) 1983-05-26 Straub, Reinhold, 7230 Schramberg Mikrochirurgisches Instrument.
DE8311392U1 (de) 1983-12-15 Storz-Endoskop GmbH, 6207 Schaffhausen Medizinische Zange
DE8418993U1 (de) 1984-06-23 1984-09-20 Richard Wolf Gmbh, 7134 Knittlingen Medizinische Zange
DE9115760U1 (de) 1991-12-19 1992-02-13 Lang, Dieter, 8647 Stockheim, De
DE9405468U1 (de) 1994-03-31 1994-06-30 Aesculap Ag Chirurgisches Instrument
US5374277A (en) * 1992-10-09 1994-12-20 Ethicon, Inc. Surgical instrument
US5383888A (en) * 1992-02-12 1995-01-24 United States Surgical Corporation Articulating endoscopic surgical apparatus
EP1250891A2 (de) 2001-04-18 2002-10-23 Olympus Optical Co., Ltd. Chirurgisches Instrument

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8302716U1 (de) 1983-05-26 Straub, Reinhold, 7230 Schramberg Mikrochirurgisches Instrument.
DE8311392U1 (de) 1983-12-15 Storz-Endoskop GmbH, 6207 Schaffhausen Medizinische Zange
US4258716A (en) 1978-02-06 1981-03-31 The University Of Melbourne Microsurgical instruments
DE8418993U1 (de) 1984-06-23 1984-09-20 Richard Wolf Gmbh, 7134 Knittlingen Medizinische Zange
DE9115760U1 (de) 1991-12-19 1992-02-13 Lang, Dieter, 8647 Stockheim, De
US5383888A (en) * 1992-02-12 1995-01-24 United States Surgical Corporation Articulating endoscopic surgical apparatus
US5374277A (en) * 1992-10-09 1994-12-20 Ethicon, Inc. Surgical instrument
DE9405468U1 (de) 1994-03-31 1994-06-30 Aesculap Ag Chirurgisches Instrument
EP1250891A2 (de) 2001-04-18 2002-10-23 Olympus Optical Co., Ltd. Chirurgisches Instrument

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
European Search Report, Sep. 21, 2004.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD669177S1 (en) * 2010-11-15 2012-10-16 Karl Storz Gmbh & Co. Kg Antrum punch forceps
USD669178S1 (en) * 2010-11-15 2012-10-16 Karl Storz Gmbh & Co. Kg Antrum punch forceps

Also Published As

Publication number Publication date
DE502004005673D1 (de) 2008-01-24
EP1488749A1 (de) 2004-12-22
EP1488749B1 (de) 2007-12-12
DE10327655A1 (de) 2005-01-27
US20050038469A1 (en) 2005-02-17

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